t-SNE or not t-SNE, that is the question
Automatic Target Recognition XXXI(2021)
Abstract
T-distributed Stochastic Neighbor Embedding (t-SNE) has become an extremely popular algorithm for low- dimensional visualization of high dimensional data. While it is acknowledged that it is highly sensitive to its parameters, it continues to be used extensively by the machine learning community, with `intuition' an accepted basis for embedding selection. In this paper, we will illustrate and explain why t-SNE is not a distance preserving algorithm, but rather order preserving, with the cardinality of the order proportional to the perplexity parameter. We compare and contrast t-SNE with Sammon Nonlinear Mappings locally using Kruskal Stress and Spearman Rank Correlation measures.
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Key words
t-sne,t-sne
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